The Wild and Wonderful World of Mammals Mammals may be the most diverse group of vertebrates that have ever lived. (Don’t tell the mollusk enthusiasts over at Cephalopod Week.) Many people share their homes with another mammal as a pet, like a dog or cat. The largest creatures on earth are mammals: Ocean-dwelling blue whales are the biggest animals that have ever lived, and African elephants are the biggest animals on land. And lest we forget, humans, too, are mammals. The history and diversity of mammalians is the subject of a new book by paleontologist Steve Brusatte, “The Rise and Reign of the Mammals.” Steve joins Ira to talk about why mammals have been so successful over the years, and why extinct mammals deserve as much love as the beloved dinosaurs. A Squid-tastic Night Out How do you fossilize a squishy squid? Do octopuses see in color, and do they have arms or tentacles? Which came first, the hard-shelled nautilus or the soft-bodied octopus, squid, or cuttlefish? And what does ‘cephalopod’ mean, anyhow? This week, Ira ventured to the Maritime Aquarium in Norwalk, Connecticut for a special Cephalopod Week celebration. He was joined by experts Barrett Christie, the director of animal husbandry for the Maritime Aquarium, and Christopher Whalen, a postdoctoral researcher and invertebrate paleontologist at the American Museum of Natural History in New York. They also discussed the challenges of caring for cephalopods in an aquarium environment, some of the amazing abilities of these animals, and what it’s like to discover a previously unknown cephalopod genus and species in fossilized material stored in museum archives. Together, they tackled audience cephalopod questions large, small, and multi-armed. Transcripts for each segment will be available the week after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

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